diff options
| author | Jacob Keller <jacob.e.keller@intel.com> | 2017-07-10 22:23:15 +0200 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2017-10-03 17:12:44 +0200 |
| commit | b4fcd43661df0d84cc4e030ab7a26533114889b9 (patch) | |
| tree | 1bed34a46ee5413e00f9b733686c67e27a5d7f13 | |
| parent | fm10k: prepare_for_reset() when we lose PCIe Link (diff) | |
| download | linux-b4fcd43661df0d84cc4e030ab7a26533114889b9.tar.xz linux-b4fcd43661df0d84cc4e030ab7a26533114889b9.zip | |
fm10k: use spinlock to implement mailbox lock
Lets not re-invent the locking wheel. Remove our bitlock and use
a proper spinlock instead.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k.h | 15 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 3 |
2 files changed, 8 insertions, 10 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h index ba70c58ca920..74542e9d63c7 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k.h +++ b/drivers/net/ethernet/intel/fm10k/fm10k.h @@ -276,7 +276,6 @@ enum fm10k_state_t { __FM10K_SERVICE_SCHED, __FM10K_SERVICE_REQUEST, __FM10K_SERVICE_DISABLE, - __FM10K_MBX_LOCK, __FM10K_LINK_DOWN, __FM10K_UPDATING_STATS, /* This value must be last and determines the BITMAP size */ @@ -346,6 +345,8 @@ struct fm10k_intfc { struct fm10k_hw_stats stats; struct fm10k_hw hw; + /* Mailbox lock */ + spinlock_t mbx_lock; u32 __iomem *uc_addr; u32 __iomem *sw_addr; u16 msg_enable; @@ -386,23 +387,17 @@ struct fm10k_intfc { static inline void fm10k_mbx_lock(struct fm10k_intfc *interface) { - /* busy loop if we cannot obtain the lock as some calls - * such as ndo_set_rx_mode may be made in atomic context - */ - while (test_and_set_bit(__FM10K_MBX_LOCK, interface->state)) - udelay(20); + spin_lock(&interface->mbx_lock); } static inline void fm10k_mbx_unlock(struct fm10k_intfc *interface) { - /* flush memory to make sure state is correct */ - smp_mb__before_atomic(); - clear_bit(__FM10K_MBX_LOCK, interface->state); + spin_unlock(&interface->mbx_lock); } static inline int fm10k_mbx_trylock(struct fm10k_intfc *interface) { - return !test_and_set_bit(__FM10K_MBX_LOCK, interface->state); + return spin_trylock(&interface->mbx_lock); } /* fm10k_test_staterr - test bits in Rx descriptor status and error fields */ diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c index 4e5e3e64beda..240772ad5d69 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c @@ -1921,6 +1921,9 @@ static int fm10k_sw_init(struct fm10k_intfc *interface, netdev_rss_key_fill(rss_key, sizeof(rss_key)); memcpy(interface->rssrk, rss_key, sizeof(rss_key)); + /* Initialize the mailbox lock */ + spin_lock_init(&interface->mbx_lock); + /* Start off interface as being down */ set_bit(__FM10K_DOWN, interface->state); set_bit(__FM10K_UPDATING_STATS, interface->state); |